does Plan A cost more than Plan B?

Question

A phone company offers two monthly charge plans. In Plan A, there is no monthly fee, but the customer pays 6 cents per minute of use. In Plan B, the customer pays a monthly fee of $4.90 and then an additional 5 cents per minute of use. For what amounts of monthly phone use will Plan A cost more than Plan B?

Answer 1

Let x = number of minutes

0.06x > 0.05x + 4,90

Solve for x.